Heterogeneity (noun)

1. The quality or state of being diverse or different from one another.
2. The presence of different types of elements or groups within a system or population.

Origin:

From the greek word "heteros" meaning "other" and "genos" meaning "kind".

Examples:

1. The heterogeneity of the patient population made it difficult to find a treatment that would work for everyone.
2. The study found that the heterogeneity of the tumor samples affected the accuracy of the diagnosis.
3. Social heterogeneity refers to the presence of different groups with different characteristics in a society.
4. Economic heterogeneity refers to the differences in wealth, income or occupation among a population.
5. The heterogeneity of the city's population is reflected in the diversity of its restaurants and cultural events.